Khan Koga raised the 100th Assault Cluster in the mid 3050s as an experiment. At inception it was almost entirely staffed with freeborn warriors.[2] Between 3060 and 3067 the 100th Assault Cluster was stationed on Foster.[3][4]

In December 3074 the Steel Vipers launched a massive assault on against Clan Coyote on Tamaron with six Galaxies and a large naval force. Lambda Galaxy including the 100th was part of the Coyote defending force. The Vipers made planetfall despite the fierce aerospace attacks. After a week fighting the Viper forces made for their objectives, several major factory complexes in the Apache Mountains. The fighting to defend these saw Lambda Galaxy and the 100th destroyed.[5]